Fountain-pen



(No Model.)

G. A. BIERDEMANN.

FOUNTAIN PEN.

No. 453.608. Patented June 9,1891'.

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UNTTE STATES PATENT OFFICE.

GUSTAVUS A. BIERDEMANN, OF UTIOA, NEV YORK.

FOUNTAIN-PEN.

SPECIFICATION forming part of Letters Patent No. 453,608, dated J' une 9, 1891.

Application tiled December 17, 1890. Serial No. 374,958. (No model.)

T0 @ZZ whom t may concern:

Be it known that I, GUsrAvUs A. B1ERDE- MANN, of Utica, in the county of Oneida and State of New York,l1ave invented certain new and useful Improvements in Fountain-Pens; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and numerals of reference marked thereon, which form part of this specification.

My invention relates to an improvcmentin fountain-pens.

In the drawings which accompany and form a part of this specification, and in which similar letters and numerals of reference refer to corresponding parts in the several figures, Figure 1 shows a longitudinal central section of a pen constructed according to my improvements. Fig. 2 showsa portion of the same part shown in Fig. l in the open position. Fig. 3 shows a cro'sssection on line A B of Fig. 2, looking toward the left. Fig. 4 shows a perspective of the valve, a portion of the barrel being broken out to permit of this view. Fig. 5 shows the same part shown in Fig. 2, with a modified form of securing the valve. Fig. 6 is a cross-section of Fig. 5, taken as Fig. 3 is taken. Fig. 7 shows a perspective view of the valve shown in Fig. 5 removed. Fig. 8 shows the same parts shown in Fig. 2, with yet another modified form of securing the valve. Fig. 9 shows a section of Fig. 8, taken as Fig. 3 is taken. Fig. 10 shows a perspective view of the valve shown in Fig. S. Fig. l1 shows a longitudinal section of a portion of the pen, showing a modified form of shoulder and ferrule.

Referring more specifically to the referenceletters and numerals, l indicates the ink-reservoir closed at one end, the shell orbarrel of the reservoir being the pen holder or handle. The lower or open end of the reservoir is screwthreaded internally to receive the screwthreaded end of pen-section 2, which is provided with a pen 3, secured therein, and has suitable ink passage-ways and conductors to carry the ink to the pen. Secured Within the reservoir adjacent to the open end, and with its face toward the open end, I provide a fixed valve 4. Against this valve is adapted to be brought valve-seat 4a on the inner end of the pen-section 2.

5 is a jointprotecting ferrule and lock screw-threaded internally to engage on screwthread 5a on the pensection.

The valve 4. may be secured in the barrel or reservoir by screws a passing through the shell or wall of the reservoir and into the shank of the valve, leaving ink-ducts or passage-ways by the valve, as shown in Figs. 3 and 4, or the valve-shank may be provided with radiating-arms b, as shown in Figs. G and 7, which may be screw-threaded on their outer ends to engage internal screw-threads of the reservoir or barrel, which in that case are continued down to or below the valve 4, as shown in Fig. 5, or the screw-threads may be united from the arms, as shown at c, Figs. 9 and 10, in which case the valve may be placed in the barrel while heated and shrunk in.

In the modified form of construction shown in Fig. 1l, in lieu of the joint-protecting ferrule and lock 5, (shown in previous gures,) I provide a shoulder 2 on the pen-section, and a joint-protecting ferrule 5b screwthreaded internally to run on a screw-thread on the eX- ternal surface of the end of the barrel.

The operation of the device is substantially as follows: Taking the pen in the position shown in Fig. l, in which the reservoir is presumed to be full, it will be observed that the seat is closed down onto the valve, so that all flow of ink from the reservoir is shut off. Then it is desired to bring the pen into use, the pen-section is screwed out, thus relieving the valve-seat from the valve and allowing the ink to flow through the ducts by the valve and thence to the pen. The amount of flow is regulated by the relative relation of the valve and seat, and this is determined bythe adj usting-screw. The joint between the pensection and barrel is kept closed and the pensection locked to the barrel by screwing the ferrule 5 until it engages the end of the barrel, or, in the case of the construction shown in Fig. l1, until the ferrule engages the shoulder of the pen-section. The flow of ink to the pen in a fountain pen constructed on the principle herein described can always be maintained the same without reference to the IOC amount of ink contained in the reservoir.

Y VIhen itis desired to vdiscontinue the use of of escaping ink, no matter in what position the pen is carried.

It is evident that the valve and seat might be interch anged, and that other modifications. and changes in and from the constructions described `may he made, Without departing from the spirit of inyinvention or the equivalents of my construction.

What I claim as new, and desire to secure Vloy Letters Patent, is-

The combination, in a fountain-pen, of a barrel l] closed at one end and open and screwthreaded internally Yand externally at the otheig'fa pen-section 2, having shoulder 2, a screw-threaded portion and valve-seat at its inner end, a joint-protecting ferrule 5b, and

a valve 4, mounted on screw-threaded arms b,

substantially as set forth.

In Witness whereof I have aiiixed my signature in presence of tWo Witnesses.

GUSTAVUS A.V BIERD'EMANN.

lVitnesses:

JosIAH TERRY, M. E. ROBINSON. 

